Deploy HAProxy LoadBalancer in AWS using Ansible

In this article, we are going to deploy HA-Proxy LoadBalancer on EC2-instance using Ansible.

Why Ansible…?

Ansible automates and simplifies repetitive, complex, and tedious operations. Everybody likes it because it brings huge time savings when we install packages or configure large numbers of servers.

I create Ansible-Roles for launching EC2 instance and deploy webserver and LoadBalancer Service using the Dynamic-Inventory concept.

If you do not know how to set up Dynamic inventory for AWS, please refer to my previous article.

https://www.dhirubhai.net/pulse/deploy-apache-web-server-using-aws-dynamic-inventory-anudeep-nalla/

So Let’s Start…

For this task, I’m creating three Ansible-roles…

1.   For Launch AWS EC2 instances.

2.  For launching Apache Webserver

3.  And one more for HA-Proxy LoadBalancer

To create an Ansible-role, First create a directory /etc/ansible/roles and after that run command…

ansible-galaxy init role_name

1. Launch AWS EC2 instance:-

Code for launching the EC2 instance is below, I’m created 3 hosts for Webserver and 1 for LoadBalancer…

# tasks file for webserver
- name: Create Key Pair
  ec2_key:
      name: mykey15
      aws_region: "{{ region }}"
  register: ec2_key
- name: Copy Key to Local File
  copy:
      content: "{{ ec2_key.key.private_key }}"
      dest: "{{ key_dest }}"
      mode: '0600'
- name: Create Security Group - Allow SSh, HTTP
  ec2_group:
      name: sg_ansible_web
      description: sg for web inventory
      region: "{{ region }}"
      rules:
      - proto: tcp
        from_port: 80
        to_port: 80
        cidr_ip: 0.0.0.0/0
      - proto: tcp
        from_port: 22
        to_port: 22
        cidr_ip: 0.0.0.0/0
      rules_egress:
      - proto: all
        cidr_ip: 0.0.0.0/0
  register: sg_ansible_web
- name: Create Security Group - Allow SSh, HAProxy
  ec2_group:
      name: sg_ansible_lb
      description: sg for lb inventory
      region: "{{ region }}"
      rules:
      - proto: tcp
        from_port: 8080
        to_port: 8080
        cidr_ip: 0.0.0.0/0
      - proto: tcp
        from_port: 22
        to_port: 22
        cidr_ip: 0.0.0.0/0
      rules_egress:
      - proto: all
        cidr_ip: 0.0.0.0/0
  register: sg_ansible_lb
- name: Launch EC2 Instance for webserver
  ec2:
      key_name: mykey15
      instance_type: t2.micro
      image: "{{ image_id }}"
      wait: yes
      region: "{{ region }}"
      count: 3
      vpc_subnet_id: subnet-040fe014984c437d9
      group_id: "{{ sg_ansible_web.group_id }}"
      assign_public_ip: yes
      state: present
      instance_tags:
        Name: webserver
  register: web
- name: Launch EC2 Instance for lbserver
  ec2:
      key_name: mykey15
      instance_type: t2.micro
      image: "{{ image_id }}"
      wait: yes
      region: "{{ region }}"
      count: 1
      vpc_subnet_id: subnet-040fe014984c437d9
      group_id: "{{ sg_ansible_lb.group_id }}"
      assign_public_ip: yes
      state: present
      instance_tags:
        Name: lbserver
  register: lb
- name: Refresh Inventory File
  meta: refresh_inventory
- pause:	

    minutes: 2

Code for Web

---

# tasks file for web

- name: Install Required Package
  package:
    name: python3
    state: present
  become: true
- name: Install Apache Server
  package:
    name: httpd
    state: present
  become: true
- name: copy web page from url
  get_url:
    dest: "/var/www/html"
    url: “https://raw.githubusercontent.com/Anuddeeph/AWS_WS_Using_Ansible/master/index.html"
  become: true
- name: Start Apache Service
  service:
    name: httpd	

    state: started

By Default, Ansible does not refresh the inventory in the middle of the running playbook, so we use the meta keyword refresh_inventory in the last of this code.

So, Ec2-Instance is launched…

2. Launch Webserver On EC2 instance:

Now I need to install httpd software on EC2 instance named webserver using Ansible

---

# tasks file for web

- name: Install Required Package
  package:
    name: python3
    state: present
  become: true
- name: Install Apache Server
  package:
    name: httpd
    state: present
  become: true
- name: copy web page from url
  get_url:
    dest: "/var/www/html"
    url: “https://raw.githubusercontent.com/Anuddeeph/AWS_WS_Using_Ansible/master/index.html"
  become: true
- name: Start Apache Service
  service:
    name: httpd	

    state: started

After running this role, my webserver is configured.

3. Configure HA-Proxy LoadBalancer:

Now I need to configure my load-balancer service on ec2 instance named lbserver.

# tasks file for lbserver
- name: install haproxy software
  package:
    name: "haproxy"
    state: present
  become: true
- name: copy my conf file of lb
  template:
    src: "haproxy.cfg"
    dest: "/etc/haproxy/haproxy.cfg"
  become: true
- name: start service lb
  service:
    name: "haproxy"
    state: started	

  become: true

Now, all roles are created successfully.

Now I created one playbook for running all roles in a single click…

- hosts: localhost
  roles:
          - ec2_host
- hosts: tag_Name_webserver
  remote_user: ec2-user
  roles:
          - web
- hosts: tag_Name_lbserver
  remote_user: ec2-user
  roles:

          - lbserver

Save this playbook as setup.yml and then run…

ansible-playbook setup.yml

Finally, LoadBalancer is configured in a single command…

Let’s see the output of this…

Finally, LoadBalancer is configured in a single command…

So let’s run my LoadBalancer IP and see it is working or not…

Yup … It’s working

Great it actually uses loadbalancer concept ...see it goes to all ip's according to roundrobin principal..

Now there is no load on any server as traffic increases load balancer manage it...

In this way our task completed successfully!!!!

?? Finally I successfully completed the TASK-3 of ansible... .

? I would like to thanks Mr.Vimal Daga for giving such challenging task which helps to solve real use cases of ansible.

GitHub Link: https://github.com/Anuddeeph/Deploy-Haproxy-In-aws-using-Ansible.git

??For any queries or suggestions DM me .

!! Thanking you all for visiting my article !!